Which of the following is 47 000 written in standard form?
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Practise IGCSE 0580 questions in the style of recent Extended past papers, organised by syllabus subtopic. Each set comes with an examiner-style mark scheme and a downloadable worksheet.
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Use standard form A × 10ⁿ where 1 ⩽ A < 10 and n is an integer. Convert into and out of standard form and calculate with values in standard form.
Which of the following is 47 000 written in standard form?
Write 0.000 086 in standard form.
[1 mark]Write 5.2 × 10⁻³ as an ordinary number.
[1 mark]Calculate (3 × 10⁵) × (4 × 10²). Give your answer in standard form.
[2 marks]Which of these numbers is the largest?
Calculate (6 × 10⁸) ÷ (4 × 10³). Give your answer in standard form.
[2 marks]Calculate (8.4 × 10⁵) × (3 × 10⁻²). Give your answer in standard form.
[1 mark]Calculate (2.5 × 10⁻⁴) + (4 × 10⁻⁵). Give your answer in standard form.
[2 marks]Light travels at a speed of 3 × 10⁸ m/s. A laser pulse is sent from Earth to a satellite 3.6 × 10⁷ m away. The pulse reflects off the satellite and returns to Earth.
Find the total distance travelled by the pulse, in metres.
[1 mark]Find the time taken for the round trip, in seconds. Give your answer in standard form.
[2 marks]